cylindroma

noun

cyl·​in·​dro·​ma ˌsil-ən-ˈdrō-mə 

plural cylindromas also cylindromata -mət-ə 

: a tumor characterized by cylindrical masses consisting of epithelial cells and hyalinized stroma:

a

: a malignant tumor especially of the respiratory tract or salivary glands

b

: a benign tumor of the skin and especially the scalp